Photoinduced hole-doping effect in (Y{sub 0.5}Ca{sub 0.5})Ba{sub 2}Cu{sub 3}O{sub {delta}} films

Journal Article · Mon Dec 01 04:00:00 EST 1997 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.120323· OSTI ID:552946

Lin, C L; Lin, Y K; Chi, C C; Guan, W Y; Wu, M K ^[1]

---

1. Department of Physics and Materials Science Center, National Tsing Hua University, Hsinchu, Taiwan 300, Republic of (China)

The persistent photoinduced changes in the critical temperature T{sub C} and the normal state conductivity of (Y{sub 0.5}Ca{sub 0.5})Ba{sub 2}Cu{sub 3}O{sub {delta}} thin films are studied. Previously such effects have been observed only in underdoped YBa{sub 2}Cu{sub 3}O{sub {delta}} or YSr{sub x}Ba{sub 2{minus}x}Cu{sub 3}O{sub {delta}}, which always lead to the enhancement of both T{sub C} and conductivity. The current system can be doped from the underdoped regime to the overdoped regime by increasing its oxygen content. The photoinduced T{sub C} reduction in the overdoped films is observed. The simultaneous enhancement of conductivity is consistent with the interpretation that photoillumination always increases hole concentration in the {open_quotes}123{close_quotes} systems. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 552946
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 22 Vol. 71; ISSN 0003-6951; ISSN APPLAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
COPPER OXIDES
CRYSTAL DOPING
HIGH-TC SUPERCONDUCTORS
PHOTOCONDUCTIVITY
SUPERCONDUCTING FILMS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES